2 * Copyright (C) 2010 Felix Fietkau <nbd@openwrt.org>
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License v2 as published by
6 * the Free Software Foundation.
8 * This program is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11 * GNU General Public License for more details.
13 * You should have received a copy of the GNU General Public License
14 * along with this program; if not, write to the Free Software
15 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
21 #include <arpa/inet.h>
23 #include <net/ethernet.h>
24 #include <netinet/if_ether.h>
25 #include <netinet/ip.h>
26 #include <netinet/udp.h>
28 #include <linux/if_packet.h>
29 #include <linux/rtnetlink.h>
30 #include <linux/neighbour.h>
40 #define DPRINTF(level, ...) if (debug >= level) fprintf(stderr, __VA_ARGS__);
42 #define DPRINTF(...) do {} while(0)
46 #define __packed __attribute__((packed))
49 #define __uc(c) ((unsigned char *)(c))
51 #define MAC_FMT "%02x:%02x:%02x:%02x:%02x:%02x"
52 #define MAC_BUF(_c) __uc(_c)[0], __uc(_c)[1], __uc(_c)[2], __uc(_c)[3], __uc(_c)[4], __uc(_c)[5]
54 #define IP_FMT "%d.%d.%d.%d"
55 #define IP_BUF(_c) __uc(_c)[0], __uc(_c)[1], __uc(_c)[2], __uc(_c)[3]
57 #define DUMMY_IP ((uint8_t *) "\x01\x01\x01\x01")
59 #define DHCP_FLAG_BROADCAST (1 << 15)
61 struct relayd_interface {
62 struct list_head list;
64 struct uloop_fd bcast_fd;
65 struct sockaddr_ll sll;
66 struct sockaddr_ll bcast_sll;
67 char ifname[IFNAMSIZ];
68 struct list_head hosts;
75 struct list_head list;
76 struct relayd_interface *rif;
77 uint8_t lladdr[ETH_ALEN];
79 struct uloop_timeout timeout;
84 struct ether_header eth;
93 extern struct list_head interfaces;
95 extern int route_table;
97 void rtnl_route_set(struct relayd_host *host, bool add);
99 static inline void relayd_add_route(struct relayd_host *host)
101 rtnl_route_set(host, true);
104 static inline void relayd_del_route(struct relayd_host *host)
106 rtnl_route_set(host, false);
109 void relayd_add_interface_routes(struct relayd_interface *rif);
110 void relayd_del_interface_routes(struct relayd_interface *rif);
112 int relayd_rtnl_init(void);
113 void relayd_rtnl_done(void);
115 struct relayd_host *relayd_refresh_host(struct relayd_interface *rif,
116 const uint8_t *lladdr,
117 const uint8_t *ipaddr);
119 void relayd_forward_bcast_packet(struct relayd_interface *from_rif, void *packet, int len);
120 bool relayd_handle_dhcp_packet(struct relayd_interface *rif, void *data, int len, bool forward);